strukturag libheif up to 1.21.2 stsz/stts track.cc Track::load out-of-bounds

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.1$0-$5k0.00

Summaryinfo

A vulnerability was found in strukturag libheif up to 1.21.2 and classified as problematic. Affected is the function Track::load of the file libheif/sequences/track.cc of the component stsz/stts. The manipulation results in out-of-bounds. This vulnerability is reported as CVE-2026-3950. The attack requires a local approach. Moreover, an exploit is present. It is best practice to apply a patch to resolve this issue. The patch available is inofficial and not approved yet.

Detailsinfo

A vulnerability, which was classified as problematic, was found in strukturag libheif up to 1.21.2. Affected is the function Track::load of the file libheif/sequences/track.cc of the component stsz/stts. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on availability.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-3950. The exploitability is told to be easy. Local access is required to approach this attack. Technical details and a public exploit are known.

The exploit is shared for download at github.com. It is declared as proof-of-concept. The patch available is inofficial and not approved yet.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.1

VulDB Base Score: 3.3
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 3.3
CNA Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: github.com

Timelineinfo

03/11/2026 Advisory disclosed
03/11/2026 +0 days VulDB entry created
03/14/2026 +3 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 1715
Status: Confirmed

CVE: CVE-2026-3950 (🔒)
GCVE (CVE): GCVE-0-2026-3950
GCVE (VulDB): GCVE-100-350382
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/11/2026 13:08
Updated: 03/14/2026 21:05
Changes: 03/11/2026 13:08 (62), 03/14/2026 21:05 (31)
Complete: 🔍
Submitter: Niebelungen
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #766431: strukturag libheif 1.21.2 Out-of-Bounds Read (by Niebelungen)

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